Lokalize

Lokalize is the localization tool for KDE and other open source software

Lokalize is also a general computer-aided translation system (CAT) with which you can translate OpenDocument files (*.odt). Translate-Toolkit is used internally to extract text for translation from .odt to .xliff files and to merge translation back into .odt file.

Lokalize under Windows and OS X

It lacks project management, spellcheck, scripting, and to translate OpenDocument you will need to install and run Translate-Toolkit yourself. If you have interest in Lokalize on non-free platforms, please let me know through reporting issues on bugs.kde.org.

Tips and tricks

Search in files

Translation Memory (TM) now keeps track of where each translation pair came from. So when you want to search for string in the files on disk, you just drag the directory with those files onto translation memory tab (F7) to update TM, wait a minute or two, then type your string into right field of Translation Memory tab, then press Enter.

Then you click on one of results and this opens appropriate file, on the appropriate entry. When you want to do another search during the same day, you skip the updating step and just type what you're searching for. You can filter TM search results by filename using the field left side of the F7 panel (Filemask).